Q Acoustics Q SUB 80 Subwoofer

Q Acoustics Q SUB 80 Subwoofer

The Q Acoustics Q SUB 80 Subwoofer ensures that smaller rooms with smaller speakers still enjoy big, well-controlled bass for listening to music or watching movies. With its powerful 8-inch driver, the Q SUB 80 is the ideal partner for M20 or M40 active speakers or 3000c and 5000 Cinema Packs, whether used individually or in pairs. This subwoofer delivers deep, precise bass that perfectly complements your audio setup, enhancing both music and movie experiences.

Key features of the Q Acoustics Q SUB 80 Subwoofer:

• Q SUB80 has exceptional bass power to cabinet size ratio.
• Digital Signal Processing (DSP) allows easy system and room integration with optimised settings for class-leading, distortion-free performance.
• Clever, dual phase and delay controls allow the fine-tuning of the signal alignments for flexible room placement.
• DSP identifies the input signal and automatically adjusts system gain, enhancing performance regardless of the connected source.
• A low-pass filter with frequency adjustment ensures seamless integration with any partnering speaker system.
• A custom-designed amplifier module features four digital power amplifier stages that improve efficiency by dissipating less heat, enhancing speaker control, and reducing output impedance.

Flexible room placement

Placement in a room can impact sound arrival timing, while phase alignment issues can arise even with adjacent subwoofer placement, affecting system frequency response. The Q SUB range uses Digital Signal Processing (DSP), alongside fine delay adjustments and phase inversion switch, to address these integration challenges. This technology enables users to optimise settings for a class-leading performance, ensuring seamless integration with other speakers without needing professional installation.

Source detection

Subwoofers must accommodate a wide variety of sound input sources, including stereo preamp outputs or mono feeds from active speakers or home cinema systems. The Q SUB range uses a complex algorithm inside the DSP to identify the input signal type – stereo or mono and the level – and automatically adjusts system gain. This ensures optimal signal to noise levels and dynamic range, enhancing performance regardless of the connected source.

Classic finish to compliment your interior

The trio’s minimalist and clean design means they can blend discreetly into the room or proudly displayed to fit seamlessly into any interior space. The Q SUB series arrives in two modern but classic finishes: Satin Black with a black grille or Satin White with a grey grille. The new models join the slimline 3060S to complete Q Acoustics’ wider subwoofer family.

Power amplifier

The Q SUB amplifier module, custom-designed by Q Acoustics, includes a DSP, power amplifier, and power supply. It features four digital power amplifier stages in a parallel bridge-tied load (PBTL) configuration, enhancing efficiency and speaker control by reducing output impedance and heat dissipation. This design can deliver up to 300W continuous and 600W peak power, with exceptional total harmonic distortion (THD) performance of less than 0.1% up to 300W.

Frequency response adjustment

Subwoofers need an adjustable low pass filter to match their upper frequency response with the diminishing bass of other speakers. The Q SUB range features a low pass filter with frequency adjustment from 40 Hz to 250 Hz, setting the -6 dB point. This wide range ensures the Q SUB models can seamlessly integrate with and complement the low-frequency response of any partnering speaker system.

Driver design

The drive units feature a heavy-duty steel chassis, paper cone, and rubber surround. Bass unit diameters are 203mm (Q SUB80), 254mm (Q SUB100), and 305mm (Q SUB120). Voice coils are 38mm for Q SUB80/100 and 50mm for Q SUB120, with an aluminium demodulation ring for reduced inductance-induced modulation distortion.

Cabinet design

An infinite baffle (sealed box) design delivers tight, focused bass, coupled with DSP for precise acoustic tuning. With no port, placement near walls and furniture is easier. The Q SUB cabinets use 18mm high-density MDF with a 36mm double-thickness baffle for rigidity. Internal dart bracing enhances stability, reduces cabinet ballooning, and ensures optimal performance under high internal pressure.

Specifications of the Q Acoustics Q SUB 80 Subwoofer

• Enclosure type: Infinite baffle
• Bass unit diameter: 203 mm (8 in)
• Effective volume: 13.9 litres
• Max SPL @ 1 m: 107 dB
• Frequency response (-6dB): 36 Hz – 250 Hz
• Low pass crossover range: 50 Hz – 250 Hz
• Peak amplifier power: 400 W
• Continuous amplifier power: 200 W
• THD @ rated power: 0.09%
• Input sensitivity (max gain): 300 mv rms
• Maximum input level: 2.1 V rms
• Input impedance: 20 kΩ
• Noise floor (A wtd): 50 μV
• Dimensions (HxWxD): 315 x 315 x 347 mm (12.4 x 12.4 x 13.6 in)
• Weight (per loudspeaker): 15 kg (33 lbs)